| Harperrig Reservoir | |
|---|---|
 | |
  Harperrig Reservoir | |
| Location | West Lothian, Scotland |
| Coordinates | 55°50′0″N 3°26′40″W / 55.83333°N 3.44444°W |
| Type | reservoir |
| Basin countries | Scotland |
Harperrig Reservoir is a reservoir in West Lothian, Scotland, to the north of the Pentland Hills, four miles (6.4 km) south of Mid Calder. The Water of Leith flows through it, and nearby are Harlaw Reservoir and Threipmuir Reservoir. It has been proposed that the reservoir be designated as a local nature reserve to be managed by West Lothian Council.